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PCA9555APW from PHI,Philips

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PCA9555APW

Manufacturer: PHI

Low-voltage 16-bit I虏C-bus I/O port with interrupt and weak pull-up

Partnumber Manufacturer Quantity Availability
PCA9555APW PHI 7 In Stock

Description and Introduction

Low-voltage 16-bit I虏C-bus I/O port with interrupt and weak pull-up The **PCA9555APW** from Philips is a versatile **16-bit I/O expander** designed to enhance the input/output capabilities of microcontrollers and other digital systems. Utilizing the **I²C-bus interface**, this component enables efficient communication with minimal wiring, making it ideal for space-constrained applications.  

Featuring **16 programmable GPIO pins**, the PCA9555APW can be configured as either inputs or outputs, providing flexibility in system design. Each pin includes **internal pull-up resistors**, simplifying circuit design while reducing external component count. With an operating voltage range of **2.3V to 5.5V**, it is compatible with a wide variety of logic levels, ensuring seamless integration into diverse electronic systems.  

The device supports **interrupt functionality**, allowing immediate response to input changes without continuous polling, thereby improving system efficiency. Additionally, its **low standby current consumption** makes it suitable for power-sensitive applications.  

Common applications include **industrial control systems, consumer electronics, and embedded designs**, where expanding I/O capabilities is essential. The PCA9555APW is available in a **TSSOP-24 package**, offering a compact footprint for modern PCB layouts.  

Engineers value this component for its **reliability, ease of use, and robust performance**, making it a practical choice for expanding digital interfaces in complex electronic systems.

Application Scenarios & Design Considerations

Low-voltage 16-bit I虏C-bus I/O port with interrupt and weak pull-up

Alternative Part Number

  • TCA9555PWR --: Pin-compatible 16-bit I2C I/O expander with the same register map and interrupt output, widely available and often used as a direct drop-in replacement.
  • PCF8575CPWR --: 16-bit I2C I/O expander in the same TSSOP package with similar functionality, though it lacks the configurable input/output registers of the PCA9555.
  • MAX7311AUG+ --: 16-bit I2C port expander with interrupt and configurable I/O, functionally similar and suitable when a different vendor source is needed.

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